Bas is back on tour with J.Cole and told Robert they would make it happen. Robert says he and Collin were both crying when they got the message.

"It was just unbelievable," says Robert. He chose the concert that was closest to their home and on Saturday, dad, mom, Collin and his three siblings all headed to Washington, D.C. to attend J.Cole's Aug. 8 show.

When they arrived at the venue on Tuesday they were escorted in by Bas's private security, given the V.I.P. treatment and loaded up with some free swag.

After the show, they headed backstage where Collin finally got to meet J.Cole. Robert says they talked for about an hour.

While there, Robert says Collin commented on Cole's shoes which Cole proceeded to take off, sign and hand over to Collin on the condition that he fight hard to beat his cancer.

Robert also says Collin told Cole that his music has been inspirational for him and helped him get through this difficult time, to which Cole responded "no, you inspire me." Collin broke down in tears.